Domagoj,
Unfortunately, its not that simple. The xFlow Analyst UI is just displaying results from CA Search after filtering them through domsrvr to ensure data partitions are effective.
Location Description is not a field that we index in CA Search today. So the data doesn't exist in Search, and that's one reason why you can't see the Location Description in xFlow. In 17.0, we only display Location's Name.
You can however, access location description by clicking on the More Details option, which automatically shows the contact detail screen for you.
_R